the roll bars are direct swaps, you just need to change the bushes that hold the bars in place

they came i 14, 16, 18mm on the sierra and 22mm on the escos

when i bolted the escos one to mine it became immediately much more tail happy on the limit but gave much better grip until that moment it snapped out and was fairly uncontrollable when it did tail out

there was a fairly comprehensive thread here a few years ago about tail happiness induced rear arb settings